Karlheinz Knickel
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Gordon Purvis,
Geertrui Louwagie,
Greg Northey,
2009
.
Karlheinz Knickel,
von Susanne Münchhausen,
Anna Maria Häring,
2015
.
László Podmaniczky,
Gordon Purvis,
Geertrui Louwagie,
2012
.
Karlheinz Knickel,
K. Bruckmeier,
K. Knickel,
2009
.
Karlheinz Knickel,
Denis Barthelemy,
Peter Zander,
2005
.
Karlheinz Knickel,
Henk Renting,
J. D. Ploeg,
2004
.
Karlheinz Knickel,
Nadja Kasperczyk,
2009
.
Karlheinz Knickel,
Dipl. Ing. agr. Dr. Burkhard Schaer,
Dipl. Wirtsch. Ing. Claudia Strauch,
2006
.
Karlheinz Knickel,
Kees de Roest,
Terry Marsden,
2000
.
Karlheinz Knickel,
K. Knickel,
S. Peter,
2006
.
Karlheinz Knickel,
F. Ehrendorfer,
2000
.